There is a paved path that runs along the east & south side of the canal that the boats use between OKW and DTD. It runs along the edge of the golf course, but is separate from the golf cart paths, except for the bridges at OKW & SSR which are used by the carts. There's also a bridge at the Tree Houses.
Entry at OKW is opposite the Southpoint Pool, between villas 54 & 55. The DTD end comes out at the parking lot behind Cirque and HOB, running along the water's edge.
I can't find it any official maps or any info about it on the internal web site, but I have seen guests jogging on it. I think I even saw some lighting along it.